CS235 Datasheet, PDF (3/6 Pages) Cherry Semiconductor Corporation – System Photoelectric Smoke Detector

Electrical Characteristics: T_A = 25¡C
PARAMETER
TEST CONDITIONS
MIN
TYP
s Amplifier A2
DC Output (pin 9)
R3 = 6k½, R4 = 510½, C5 = .47µF
2.5
Input Bias Current (pin 8)
(Externally adjusted gain
with R3 and R4. Unity DC gain)
Voltage gain @ 3.5kHz
(Externally adjusted gain
21.6
with R3 and R4. Unity DC gain)
MAX
UNIT
V
250
nA
dB
s Detector and Reference Output (C4 = .47µF)
Reference Resistance
13
19
Reference Voltage
(pin 10)
1.8
3.6
Detector Output Resistance
10
15
Detector Output Voltage
(pin 11)
1.4
2.8
(No signal, and at 2X time Constant)
25
k½
5.5
V
20
k½
4.3
V
s Main Timer (R1 = 20M½, R2 = 75k½, C1 = .47µF)
Power Up Pulse Period
Standby Mode (pin 1)
Power Up Pulse Period
Speed Up Mode (pin 1)
Power Up Pulse Width
(pin 1)
Gate Pulse Width
Power up pulse width 12
Sink Current (pin 18)
V (pin 16) = 16V
Source Current (pin 18)
V (pin 16) = 16V
8
10
1.5
2
20
10
415
460
-220
-235
12
Sec
2.5
Sec
ms
ms
505
nA
-250
µA
s Output Circuit
Output Latch Voltage
(pin 3) I_SUPPLY = 100mA
4.4
5.2
Leakage Current
V (pin 3) = 38V, V (pins 2, 16) = 0V
500
6.1
V
µA
s Alarm
Alarm Reset
Supply interruption
5
Sec
Power up time
30
Sec
System will go into alarm upon detection and transfer of three consecutive alarm level signals into the counter.
3